package com.example.edu;

import java.util.Map;
import java.util.Properties;

/**
 * @author yanzhao
 * @date 2022/2/24 17:07
 * @since 1.0.0
 */
public class Main {

    public static void main(String[] args) {
        final Map<String, String> getenv = System.getenv();

        final Properties properties = System.getProperties();

        System.out.println();
    }
}
